The device is a Pantone Colorvision Spyder 1, that I inherited because the
owner, who bought it second hand without software, could not get the device to
work.

Hmm. I'm not sure that the Spyder 1 has ever been tested with Argyll. I've
certainly never
had access to one, and noone up to this point has requested support for them,
given that the
USB ID is not being recognized. I have no idea how similar or not the device is
to the
Spyder 2.
Graeme Gill.